Few people realize that mosquitoes rely on sugar as their main source of energy. Both male and female mosquitoes feed on plant nectar, fruit juices and liquids that ooze from plants. The sugar is burned as fuel for flight and is replenished on a daily basis. Blood is reserved for egg production and is imbibed by females less frequently.Females do not require blood for their own survival, but they do need supplemental substances such as protein and iron to develop eggs.

That being another story,I think the males are kind hearted among them as well !